Polynomial Graphing Calculator

Polynomial Graphing Calculator

Plot a quadratic window and inspect the key features of the curve.

Last updated: June 2026 | By Patchworkr Team

Quadratic graph window
Vertex
(0, -4)
upward, minimum
Discriminant
16
Y intercept
-4
Roots
2, -2
Sample point at x min
(-5, 21)
Sample point at center
(0, -4)
Sample point at x max
(5, 21)

Key features

f(x) = ax^2 + bx + c

The graph is a parabola, so the sign of a tells you whether it opens upward or downward. The vertex is the minimum or maximum point.

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